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(No Model.) v 2 sheets-sheet 1. W. BARDSLEY 81; W. K. OROFFORD. HATGHWAY DOOR MECHANISM.

No. 469,224. Patented Feb. 23, 1892. W WV J 5 E lrf Q i. i E w WITNESSES @w mmm Wen/Er.

(No Model.) I 2' Sheets-Sheet 2.

W. BARDSLEY & W. K. OROIF'FORD.

HATGHWAY DOOR MEGHANISM. No. 469,224. Patented Feb. 23, 1892,

ATTORNEY.

V UNITED STATES PATENT OEFIcE.

XVILLIAM BARDSLEY, OF KEARNEY, NElV JERSEY, AND \VARREN K. CROF- F ORD, OF NEXV YORK, N. Y.

HATCHWAY-DOOR MECHANISM.

SPECIFICATION forming part of Letters Patent Nlo. 469,224, dated February 23, 1892. Application filed June 1, 1891. Serial No. 394,717. (No model.)

T at whom it may concern.-

Be it known that we, WILLIAM BARDSLEY, a resident of Kearney township, New Jersey, and WARREN K. CROFFORD, a resident of New York, in the county of New York and State of New York, citizens of the United States,.have invented certain new and useful Improvements in Hatchway Door Mechanism, of which the following is a specification.

The invention relates to improvements in hatchway-door mechanism; and it consists in the devices hereinafter described and particularly pointed out in the claims, by which a the doors at the various floors of the building may be automatically opened and closed during the ascent and descent of the elevator hoist or carriage, and when closed will effectually cover the space outlined by the hatchway-frames.

The leverage mechanism hereinafter described for opening and closing the doors is especially adapted for swift-running elevators and in use has proven to be particularly efficacious.

To produce effective door opening and closing mechanism for swift-running elevators has proven to be an important and difficult problem, and the accomplishment of this object is the purpose of the present invention.

Referring to the accompanying drawings, Figure l is a central vertical section of an elevator-shaft employing the mechanism constituting the invention, the hoist or carriage being illustrated in its initial position on its ascent and descent by full and dotted lines, respectively. Fig. 2 is a like view of same, the lever mechanism being shown in the closed position itisoaused toassume by the ascending or descending hoist or carriage,which is in this figure also illustrated by full and dotted lines, respectively. Fig. 3 is a transverse section of same on thedotted line 3 8 of Fig. 1, looking downward and showing particularly the devices on the door for closing the space outlined by the hatchway-frame so as to prevent all draft through the shaft when the door is closed. Fig.4 is a like section of same on the dotted line 4 4 of Fig. 2, looking downward.

.Fig. 5 is a detached side elevation of the main operating-lever for opening and closing the door; and Fig. 6 is a detached edge View of same.

In the drawings, A designates the elevator-- shaft; 13, the hoist or carriage; O C, the vertical guides for same; D, the hoist-rope; E, the hatchway-door, and F the hatchway-door frame. The door E issecured by hinges G to the frame F, and carries at its under surface and adjacent to its center the roller H, which is set at the inner end of the slot'I cut in said door and boxed over by the cover J, as shown more particularly in Figs. 1 and 3. The roller'H is engaged by the arch K, secured to the upper end of the carriage or hoist B during the ascent of the latter. It will be observed on reference to Fig. 1 that the roller H is as nearly as possible above the center of the arch K, and that upon the ascent of the hoist the arch will, while opening the door E, permit theroller to move down it and prevent the noise and jar which would result were the arch to scrape against the surface of the door. The slot I during the ascent of the hoist B re ceives the edge of the arch K after the door has been partly opened and is continuing its movement, and hence it is that the rollerH may be placed near to the center of the door and an arch of considerable size be employed.

In the ascent of the hoist B the arch K opens the door and closes the lever mechanism to the position shown in Fig. 2, leaving an unobstructed passage for the hoist. I

The mechanism for opening the door during the descent of the hoist or carriage B consists of the pivoted rocking lever L, the rod M, connecting the lower and shorter arm of said lever with the upper surface of the door, and the frame N, secured to the lower surface of the hoist and carrying at its lower inner end the roller 0 to engage the upper portion of said lever L, as shown in Fig. 1. The lever L is provided. intermediate its sustaining pivot P and its upper end with the roller Q, and, as will be observed in Fig. 1, the said lever has a convex curve between the roller Q 5 and its upper end and an opposite curve between said roller and the pivot P. We have therefore, for convenience, termed said lever L as being Sshaped. The lever L between its roller Q and upper end has a rod R, upon which is arranged the counterbalance-weight S, whichis capable of adjustment on said rod, according to the weight of the door, by means of the set-screw T. The lower arm or extension of the lever L is provided with the adj ustable slide V, connected with the lower end of the spring W, whose upper end is secured to the threaded eyebolt X, passing through the plate a and carrying the lock-nut b. The bolt X is therefore adjustable, and hence it will be observed that the tension of the spring WV may be adjusted at either or both ends, if desired, so that the door may be balanced at its different angles of motion, the spring contracting and expanding with the opening and closing of the door and affording a variable assistance and resistance under the changing line of motion of the same. Upon the descent of the hoist or carriage B the roller 0 first rides along and depresses the upper curved end of the lever L, as shown in Fig. 1, after which the edge of the frame N moves on the roller Q in the further depression of said lever, as shown in Fig. 2. The depression of the upper end of the lever L operates to draw the connecting-rod M upward and open the door E, as shown, in order that the hoist may have a free passage downward.

- After the hoist has passed downward through the doorway the door will gradually close upon the arch K, and as the said arch recedes the door will finally fully close without material noise or jar and the lever L will assume its initial position.

The door E is provided with the auxiliary hinged doors (1 e, which open on their own hinges during the opening of the door E and close with the closing of the same to prevent an excess of draft through the elevator-shaft. The door (2 is provided at its inner end with the raised arm f, engaging one end of the connecting-rod g, whose other end is pivoted to the lug h, secured to the door e. Upon the door E is pivoted the bell-crank lever 11, one arm of which is connected by a rod 127. with the auxiliary door e, while the other arm .thereof is pivoted to the rod n, whose outer end curves downward into a recess in the framing F, and is there pivotally secured-on a plane lower than that of the surface of the door or the hinges G, as shown in Figs. 1 and 2. During the opening of the door E the rod n draws on the bell-crank lever i and turning the same moves the rod on inward and opens the auxiliary'door e, which turning upward on its hinges forces the rod 9 inward. and opens the auxiliary door d. The doors d e thusopen simultaneously, and they close in like manner, since upon the closing of the door E the movement of the bell-crank lever 21 and rods m g is reversed and both auxiliary doors have the closing motion imparted to them at one time.

What we claim as our invention, and desire to secure by Letters Patent, is

1. In hatchway-door mechanism, the lever L, mounted on a pivot P and having its shorter arm extending beyond said pivot, the longer arm of said lever normally extending upward at an angle and having the convex curve along its outer end and concave curve along its inner end, as shown, combined with the horizontal door in the path of the elevatorcarriage, and the rod M, extending downward from said shorter arm to said door, the whole being arranged substantially as and for the purposes set forth.

2. In hatchway-door mechanism, the lever L, mounted on a pivotP and having its shorter arm extending beyond said pivot, the longer arm of said lever having at about its center the roller Q and being convex at the outer side of said roller and concave at the inner side thereof, as shown, combined with the horizontal door in the path of the elevatorcarriage, and the rod M, connecting said shorter arm and said door, substantially as and for the purposes set forth.

3. In hatchway-door mechanism, the S shaped lever L, mounted on the pivot P and having its shorter arm-extending beyond said pivot, combined with the horizontal door in the path of the elevator-carriage, the rod M,

connecting said shorter arm with said door,

the coiled spring W, exerting an upward pull on said shorter arm, and the slide V, connected with the lower end of the spring W and adjustable on said shorter arm toward or from the pivot P, substantially as and for the purposes set forth.

4. In hatchway-door mechanism, the pivotally-mounted lever L, having its shorter arm extending beyond the sustaining-pivot and its longer arm havin g both a convex and concave curve, as shown, combined with the rod R beneath the upper curved end of the lever L, the weight S, adjustable on said rod R, and the rod M, connecting said shorter arm with the horizontal door, substantially as and for the purposes set forth. m

5. The hatchway-door and the auxiliary doors d e, hinged thereto, combined with the bell-crank lever 11, the rod m, connecting one arm of said. lever with the door e, the rod 41,

pivoted to the other arm of'said lever and at I its outer end secured to the framing on a plane below the surface of the hatchwaydoor, the arm f on the door 01, and the connecting-rod g, engaging said arm f, substantially as and for the purposes set forth.

6. In hatchway-door mechanism, the pivoted lever L, having the shorter arm at one side of its pivot P and the convex and concave curves at the other side of said pivot, combined with the door, the rod M, connecting said shorter arm with said door, the hoist, and the frame N, secured to the lower surface of said hoist and carrying at its lower inner end the roller 0, substantially as and for the purposes set forth.

7. The hatchway-door and the auxiliary door 6, hinged thereto, combined with the bell-crank lever 2', the rod m, and the rod n, the latter at its outer end being secured to the framing on a plane below the surface of said door, substantially as set forth.

Signed at New York, in the county of New York and State of New York, this 29th day 10 of May, A. D. 1891.

WILLIAM BARDSLEY. WARREN K. OROFFORD. Witnesses:

CHAS. O. GILL, ED. D. MILLER. 

